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Kimi K3 vs GPT 5.6 Terra

At a glance
MoonshotAIKimi K3

MoonshotAI's 2.8T-parameter flagship for complex coding, knowledge work, and long-horizon agent runs.

1.0M ctx$3.00/$15.00 per M
OpenAIGPT 5.6 Terra

OpenAI's balanced GPT-5.6 tier — GPT-5.5-class quality for everyday work at half the price.

1.1M ctx$2.50/$15.00 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
MoonshotAIKimi K3
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-16
Reasoning & Knowledge
Graduate Science93.5%Expert-Level43.5%
Agentic
Terminal Tasks88.3%
OpenAIGPT 5.6 Terra
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-11
Cheaper
Reasoning & Knowledge
Graduate Science92.9%Expert-Level—
Agentic
Terminal Tasks87.4%
Specs
MoonshotAIKimi K3
1.0M
Context
16K
Max output
Jul 2026
Released
OpenAIGPT 5.6 Terra
1.1M
Context
128K
Max output
Jul 2026
Released
Capabilities
MoonshotAIKimi K3
Vision
Audio
Reasoning
OpenAIGPT 5.6 Terra
Vision
Audio
Reasoning
Pricing
MoonshotAIKimi K3
Live pricing, shown before you run
Input$3.00/M tokens
Output$15.00/M tokens
Cache read$0.30/M tokens
OpenAIGPT 5.6 Terra
Live pricing, shown before you run
Input$2.50/M tokens
Output$15.00/M tokens
Cache read$0.25/M tokens
Web search$0.01/search
Chat with Kimi K3Go to model
Chat with GPT 5.6 TerraGo to model
Frequently Asked Questions: Kimi K3 vs GPT 5.6 Terra▼

Which is better, Kimi K3 or GPT 5.6 Terra?

▼

Both Kimi K3 and GPT 5.6 Terra are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Kimi K3 or GPT 5.6 Terra?

▼

GPT 5.6 Terra has a lower blended cost. Kimi K3: $3.00 input / $15.00 output. GPT 5.6 Terra: $2.50 input / $15.00 output.

Which has a larger context window, Kimi K3 or GPT 5.6 Terra?

▼

GPT 5.6 Terra has a larger context window: Kimi K3 supports 1M tokens vs GPT 5.6 Terra at 1.1M tokens.

Do both Kimi K3 and GPT 5.6 Terra support vision?

▼

Yes, both Kimi K3 and GPT 5.6 Terra support vision/image input.

What are the key differences between Kimi K3 and GPT 5.6 Terra?

▼

Kimi K3 and GPT 5.6 Terra have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Kimi K3 and GPT 5.6 Terra for free on idapt.app to see which performs better for your specific needs.

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